#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <assert.h>

void* my_memmove(void* dest, const void* src, size_t num)
{
	assert(dest && src);
	void* ret = dest;
	if (dest < src)
	{
		while (num--)
		{
			*((char*)dest) = *((char*)src);
			dest = (char*)dest + 1;
			src = (char*)src + 1;
		}
	}
	else
	{
		while (num--)
		{
			*((char*)dest + num) = *((char*)src + num);
		}
	}
	return ret;
}

int main()
{
	int arr1[] = { 1,2,3,4,5,6,7,8,9,10 };
	my_memmove(arr1, arr1+2, 5 * sizeof(arr1[0]));
	for (int i = 0;i < (sizeof(arr1) / sizeof(arr1[0]));i++)
	{
		printf("%d ", arr1[i]);
	}
	return 0;
}